Carbureter.



P. H. WALKER.

CARBURETER.

AP-PLIOATION FILED JULY 27, 1911.

Patented Sept. 24,1912.

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A Homey/x WITNESSES a citizen gine to start the same,

UNITED STATES PriTENT oEEioE.

FRANK 2E. WALKER, OF LAPORTE, INDIANA,

To aZZ whom it may concern Be it known that LNFRANK H. WALKEm of the United States, residing at Laporte,'in the' county of Laporte and State of Indiana, have` invented certain. new and useful Improvements in Carbureters, of which the followingris a specification. l The carbureter which is the subject of the present invention is designed more particularly for use in connection with .internalcombustion engines for the purpose of supplying an initial charge ofl fuel to the enthe device being independent of the carburetor which supplies the charge when the engine isl running.

It is the object of the invention to provide a carbureter of the kind stated which delivers the initial charge by means of .come pressed air` and, furthermore, to provide a Anovel combination and arrangement of parts by which an intimate -mixture of air and hydrocarbon is effected.

In order that the invention may be better understood, reference is had to the 'accompanying'drawing, in'which'a vertical section of the carbureter is shown.

Referring specifically to the drawing, 5 denotes a closed vessel having a tapped .opening 6 on one side for connection with a source of hydrocarbon or otherl liquid fuel. Any suitable means may be provided for maintaining a. constant fuel level in the vessel, and as such means are known in the art, and form no part of the present invention, they have not been illustrated. On the other side of the .vessel is an air inlet passage 7 which opens into the vessel near the top thereof as indicated at 8 above the liquid level therein. The top of the vessel is closed by 'a cap 9 which 4is 4 removably secured by screws or other suitable means. I

In the bottom portion of the lvessel 5.is formed a chamber 10 which is in communication with the air passage 7 through a port 11, which latter is controlled by a spring seated valve 12. The valve opens into the chamber 10, and is normally held closed by. a spring 13 coiled around astem 14 depending from tlieback of the valve and' extendingl into a longitudinal recess or bore 15 in a plug 16 screwed -into the wall of the chamber 1'0, the spring being located between the valve andthe inner end of the recess. The tension ofthe spring may be regulated by the plugl. The chamber 10 old and Welly has an outlet 17 to which is connected a` suitable coupling member 18 for connection .to the intake of the engine.

Into the bottom of the vessel 5 is screwed a' nozzle having its inlet end 19 extending into thev vessel, and its tip or`outlet end'20 extending through the chamber 10 in line with the outlet 17 so as to discharge into the latter, the tip projecting slightly into the outlet. The bore 21 of the inlet end of the nozzle has a `valve scat 22 which is controlled by a -needle valve `23 threaded through the cap 9. To the cap 9, on the in side of the vessel 5, is also secured a depending cylindrical sleeve 21 which surrounds theinlet end 19 of the' nozzle in spaced relation therewith' and in close proximity Patented Sept. 24, 1912. y

eoA

thereto to forma contracted passage to the nozzle inlet. The lower end of the sleeve is spaced from the bottom of the vessel, and near the top of the sleeve, above the inlet end of the nozzle and the liquid level in the vessel, the sleeve has a small air port 25 lwhich is lfor a purpose to be presently described.

'lhe operation of the carbureter is as follows: The air inlet 7 will Abe connected to a suitable source of compressed air. dotted line L shows the fuel level in the vessel. Upon turning the air on, the pressure thereof on the top of the liquid fuelforces The a charge of the same up into the sleeve 24 and thence into the bore `of the nozzle from which it is discharged by the tip 20 into the outlet 17. lVhen the air pressure in the inlet. 7 overcomes the tension of the spring 13,

.the valve 12 opens, and air flows from the inlet through the port 11 into the chamber 10 and past the mouth of the nozzle intothe outlet 17. Air also enters the sleeve through the port 25, and the. pressure within thesleeve becomes equal to that without vthe saine, and the liquidwithin the sleeve falls to the normal level. At the same time, the air entering the port 25 mixes with the liquid passing through the nozzle and helps to spray it at the tip of the latter. The sleeve therefore serves as a carbureting chamber. The outlet 17 is a mixing chamber, the spray upon issuing from the tip of the nozzle mixing with the air flowing past the same.

4It will be evident from the foregoing that the carbureter'de ends upon a pressure t0 vaporize the liqui by breaking it into a tine spray A small delivery pipecarries .the

fmixture, especially in mouth of the nozzle,

vapor quickly to the engine cylinder, therey avoidingas much as possible the vapor coming in contact with the surface of the pipe, as this'has a tendency to thin t-he cold weather. The l mixing' of the liquid and air depends on the drawing action of the air as it passes the mouth of the nozzle under a heavy pressure, and it picks up the liquid which is sprayed stronglyfrom the nozz.le because of tie greater pressure forcing 1t down, the difference in the pressures existing in the carbureting and mixing chambers depending mainly on the tension of the valve spring 13. The air passing down the nozzle' with the liquid gets well mixed, under pressure, and when the mixture issues from the 'the air expands under existing there and t-he lighter pressure more force into the throws the liquid with passing air current.

The carbureter is simple in construction and it etiectually serves the purpose for which it is' designed. Thepreferred embodiment of the invention has been shown, but itwill, of course, be understood ythat the structure is capable of considerable. modilication within the scope of the invention as herein set forth and claimed.

l claim:

l. In a carbureter, a liquid fuel Vessel having an air inlet and a mixture outlet, a jet nozzle having its inletl connected to the vessel and its outlet discharging into the mixture outlet, means fory discharging fuel from the vessel through the nozzle by air pressure, means foi-.delivering air under pressure past the outlet of the nozzle, and a pressure reducing valve for said delivery means.

ln a carbureter, a liquid fuel vessel having a compressed air inlet and a mixture outlet, a nozzle extending into the vesseland discharging into the mixture out-let, a sleeve surrounding the inlet end of the nozzle and having an air port vabove the liquid level in the vessel, means for delivering air under pressure `into the mixture outlet past the. mouth of the nozzle, and a. pressure reducing valve for said delivery means.

'liquid level in the vessel, an air discharging into the mixture outlet, a sleeve ing a compressed air inlet and a mixture outlet, a nozzle extending into the vesseland discharging into the mixture outlet, a

`sleeve surrounding' the -inlet end of thel nozzle and having an air port 'above the passage from the aforesaid air outlet past the mouth of the nozzle', and a pressure-reducing valve in said passage.

5. ln a carbureter, a liquid fuel vessel havlng a compressed air inlet and a mixture outlet, a nozzle extending upwardly into the vessel from the bottom thereof and discharging into the mixture outlet, a sleeve depending from the top of the vessel and surrounding in spaced relation that portion of the nozzle which extends into the vessel, the lower end of the sleeve being spaced from the bottom of the vessel, and its upper end above the liquid level ing an air port, means for delivering air under pressure intothe mixture outlet past the mouth of the nozzle, and a pressure reducing valve for said delivery means.'

6. ,In a carbureter, a liquid fuel vessel having a compressed air inlet and a mixture outlet, a nozzle extending into the vessel and .discharging into the mixture outlet, asleeve surrounding the inlet end of the nozzle and located in close proximity thereto to form. a

contracted passage to the nozzle inlet, said sleeve having an air port above the liquid level in the vessel, means for delivering air under pressure into the mixture outlet past the mouth of the nozzle, and a pressure reducing valve for said delivery means.

In testimony whereof in presence of two Witnesses.

FRANK H. VALKER.

3. In a carbureter,:a liquid fuel vessel hav- Witnesses: ing a compressed air 1nlet and a mixture out- EzRA C. SHURRA'TT, let, a nozzle extendlngi-nto the vessel and O. E. BULKELEY.

Copies ofxthis patent may be obtained for :five cents each, by addressing the Commissioner of Patents,

Washington, D. C.

Iaiiix my signature 

